If you only have capacity for 15 bikes, don't let people know you're looking for unused bikes. Every effort I've been part of has been overwhelmed by donations. As they come in, decide which are worthy of your efforts, which have components you can use, and which go straight into recycling. Your standards will slide, depending upon what's donated. Disposing of unusable bikes & components should be part of the plan.
Sorting stripped parts is always a challenge. Plan early, but stay flexible. Shelving units with reusable containers of various sizes can be very handy. Have a way to decide what you'll actually be able to use, so you don't end up storing junk that nobody wants. Selling parts has historically accounted for about half our income.
You might want to get started now on a long term goal of finding a location with more storage. I suspect space will be your biggest constraint.
From: Jennifer Kay
Hi! I am with La Bikery in Moncton, New Brunswick. We are in the initial
stages of starting up a small scale recycle - a - bike program (storage
capacity = 12-15 bikes). I am sure there are plenty of success stories
already out there, so I am hoping to draw on some of your expertise. If
you have any functioning models to share (or examples of what NOT to do!),
I would be grateful to hear from you.